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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [hal/] [calmrisc32/] [arch/] [v2_0/] [src/] [hal_misc.c] - Rev 584
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//========================================================================== // // hal_misc.c // // HAL miscellaneous functions // //========================================================================== //####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. // // eCos is free software; you can redistribute it and/or modify it under // the terms of the GNU General Public License as published by the Free // Software Foundation; either version 2 or (at your option) any later version. // // eCos is distributed in the hope that it will be useful, but WITHOUT ANY // WARRANTY; without even the implied warranty of MERCHANTABILITY or // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License // for more details. // // You should have received a copy of the GNU General Public License along // with eCos; if not, write to the Free Software Foundation, Inc., // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. // // As a special exception, if other files instantiate templates or use macros // or inline functions from this file, or you compile this file and link it // with other works to produce a work based on this file, this file does not // by itself cause the resulting work to be covered by the GNU General Public // License. However the source code for this file must still be made available // in accordance with section (3) of the GNU General Public License. // // This exception does not invalidate any other reasons why a work based on // this file might be covered by the GNU General Public License. // // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. // at http://sources.redhat.com/ecos/ecos-license/ // ------------------------------------------- //####ECOSGPLCOPYRIGHTEND#### //========================================================================== //#####DESCRIPTIONBEGIN#### // // Author(s): nickg // Contributors: nickg, jlarmour // Date: 1999-01-21 // Purpose: HAL miscellaneous functions // Description: This file contains miscellaneous functions provided by the // HAL. // //####DESCRIPTIONEND#### // //========================================================================*/ #include <pkgconf/hal.h> #include <cyg/infra/cyg_type.h> // Base types #include <cyg/infra/cyg_trac.h> // tracing macros #include <cyg/infra/cyg_ass.h> // assertion macros #define CYGARC_HAL_COMMON_EXPORT_CPU_MACROS #include <cyg/hal/hal_arch.h> // architectural definitions #include <cyg/hal/hal_intr.h> // Interrupt handling #include <cyg/hal/hal_cache.h> // Cache handling /*------------------------------------------------------------------------*/ /* If required, define a variable to store the clock period. */ #ifdef CYGHWR_HAL_CLOCK_PERIOD_DEFINED CYG_WORD32 cyg_hal_clock_period; #endif /*------------------------------------------------------------------------*/ /* First level C exception handler. */ externC void __handle_exception (void); externC HAL_SavedRegisters *_hal_registers; externC void* volatile __mem_fault_handler; externC cyg_uint32 cyg_hal_exception_handler(HAL_SavedRegisters *regs) { int vec = regs->vector; #if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS) // If we caught an exception inside the stubs, see if we were expecting it // and if so jump to the saved address if (__mem_fault_handler) { switch (vec) { case CYGNUM_HAL_VECTOR_SWI: regs->spc_swi = (CYG_ADDRWORD)__mem_fault_handler; break; case CYGNUM_HAL_VECTOR_FIQ: regs->spc_fiq = (CYG_ADDRWORD)__mem_fault_handler; break; case CYGNUM_HAL_VECTOR_IRQ: regs->spc_irq = (CYG_ADDRWORD)__mem_fault_handler; break; default: regs->spc_expt = (CYG_ADDRWORD)__mem_fault_handler; break; } return 0; // Caught an exception inside stubs } // Set the pointer to the registers of the current exception // context. At entry the GDB stub will expand the // HAL_SavedRegisters structure into a (bigger) register array. _hal_registers = regs; __handle_exception(); #elif defined(CYGFUN_HAL_COMMON_KERNEL_SUPPORT) && defined(CYGPKG_HAL_EXCEPTIONS) // We should decode the vector and pass a more appropriate // value as the second argument. For now we simply pass a // pointer to the saved registers. We should also divert // breakpoint and other debug vectors into the debug stubs. cyg_hal_deliver_exception( vec, (CYG_ADDRWORD)regs ); #else CYG_FAIL("Exception!!!"); #endif return 0; } /*------------------------------------------------------------------------*/ /* default ISR */ #ifndef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT externC cyg_uint32 hal_default_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data) { #if defined(CYGDBG_HAL_CALM32_DEBUG_GDB_CTRLC_SUPPORT) && \ defined(CYGHWR_HAL_GDB_PORT_VECTOR) && \ defined(HAL_CTRLC_ISR) #ifndef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN if( vector == CYGHWR_HAL_GDB_PORT_VECTOR ) #endif { cyg_uint32 result = HAL_CTRLC_ISR( vector, data ); if( result != 0 ) return result; } #if defined(CYGSEM_HAL_USE_ROM_MONITOR_CygMon) #if defined(HAL_DIAG_IRQ_CHECK) { cyg_uint32 ret; /* let ROM monitor handle unexpected interrupts */ HAL_DIAG_IRQ_CHECK(vector, ret); if (ret<=0) return ret; } #endif // def HAL_DIAG_IRQ_CHECK #endif // def CYGSEM_HAL_USE_ROM_MONITOR_CygMon #endif CYG_TRACE1(true, "Interrupt: %d", vector); CYG_FAIL("Spurious Interrupt!!!"); return 0; } #else // CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT externC cyg_uint32 hal_arch_default_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data) { #if defined(CYGDBG_HAL_CALM32_DEBUG_GDB_CTRLC_SUPPORT) && \ defined(CYGHWR_HAL_GDB_PORT_VECTOR) && \ defined(HAL_CTRLC_ISR) #if defined(CYGSEM_HAL_USE_ROM_MONITOR_CygMon) #if defined(HAL_DIAG_IRQ_CHECK) { cyg_uint32 ret; /* let ROM monitor handle unexpected interrupts */ HAL_DIAG_IRQ_CHECK(vector, ret); if (ret<=0) return ret; } #endif // def HAL_DIAG_IRQ_CHECK #endif // def CYGSEM_HAL_USE_ROM_MONITOR_CygMon #endif return 0; } #endif // CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT /*------------------------------------------------------------------------*/ /* data copy and bss zero functions */ typedef void (CYG_SYM_ADDRESS)(void); // All these must use this type of address to stop them being given relocations // relative to $gp (i.e. assuming they would be in .sdata) extern CYG_SYM_ADDRESS __ram_data_start; extern CYG_SYM_ADDRESS __ram_data_end; extern CYG_SYM_ADDRESS __rom_data_start; #ifdef CYG_HAL_STARTUP_ROM void hal_copy_data(void) { short *p = (short *)&__ram_data_start; short *q = (short *)&__rom_data_start; short x; while( p != (short *)&__ram_data_end ) { asm volatile( "ldch %0,@%1\n" : "=r"(x) : "r"(q) ); *p++ = x; q++; } } #endif extern CYG_SYM_ADDRESS __bss_start; extern CYG_SYM_ADDRESS __bss_end; void hal_zero_bss(void) { short *p = (short *)&__bss_start; while( p != (short *)&__bss_end ) *p++ = 0; } /*------------------------------------------------------------------------*/ #ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG cyg_bool cyg_hal_stop_constructors; #endif typedef void (*pfunc) (void); extern pfunc __CTOR_LIST__[]; extern pfunc __CTOR_END__[]; void cyg_hal_invoke_constructors(void) { #ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG static pfunc *p = &__CTOR_END__[-1]; cyg_hal_stop_constructors = 0; for (; p >= __CTOR_LIST__; p--) { (*p) (); if (cyg_hal_stop_constructors) { p--; break; } } #else pfunc *p; for (p = &__CTOR_END__[-1]; p >= __CTOR_LIST__; p--) (*p) (); #endif } // cyg_hal_invoke_constructors() /*------------------------------------------------------------------------*/ /* Determine the index of the ls bit of the supplied mask. */ cyg_uint32 hal_lsbit_index(cyg_uint32 mask) { cyg_uint32 n = mask; static const signed char tab[64] = { -1, 0, 1, 12, 2, 6, 0, 13, 3, 0, 7, 0, 0, 0, 0, 14, 10, 4, 0, 0, 8, 0, 0, 25, 0, 0, 0, 0, 0, 21, 27 , 15, 31, 11, 5, 0, 0, 0, 0, 0, 9, 0, 0, 24, 0, 0 , 20, 26, 30, 0, 0, 0, 0, 23, 0, 19, 29, 0, 22, 18, 28, 17, 16, 0 }; n &= ~(n-1UL); n = (n<<16)-n; n = (n<<6)+n; n = (n<<4)+n; return tab[n>>26]; } /*------------------------------------------------------------------------*/ /* Determine the index of the ms bit of the supplied mask. */ cyg_uint32 hal_msbit_index(cyg_uint32 mask) { cyg_uint32 x = mask; cyg_uint32 w; /* Phase 1: make word with all ones from that one to the right */ x |= x >> 16; x |= x >> 8; x |= x >> 4; x |= x >> 2; x |= x >> 1; /* Phase 2: calculate number of "1" bits in the word */ w = (x & 0x55555555) + ((x >> 1) & 0x55555555); w = (w & 0x33333333) + ((w >> 2) & 0x33333333); w = w + (w >> 4); w = (w & 0x000F000F) + ((w >> 8) & 0x000F000F); return (cyg_uint32)((w + (w >> 16)) & 0xFF) - 1; } /*------------------------------------------------------------------------*/ /* Idle thread action */ #include <cyg/infra/diag.h> void hal_idle_thread_action( cyg_uint32 count ) { } /*------------------------------------------------------------------------*/ /* End of hal_misc.c */
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